Charles Sherlock Fillmore (August 22, 1854 - July 5, 1948) founded Unity, a church within the New Thought movement, with his wife, Myrtle Page Fillmore, in 1889. He became known as an American mystic for his contributions to spiritualist interpretations of biblical Scripture.
He met his future wife, Mary Caroline Page, known as Myrtle, in Denison, Texas in the mid-1870s. After losing his job there, he moved to Gunnison, Colorado where he worked at mining and real estate.
He married Myrtle in Clinton, Missouri on March 29, 1881 and the newlyweds moved to Pueblo, Colorado, where Charles established a real estate business with the brother-in-law of Nona Lovell Brooks, who was later to found the Church of Divine Science.
In 1889, Charles and Myrtle began publication of a new periodical, 'Modern Thought', notable among other things as the first publication to accept for publication the writings of the then 27-year-old New Thought pioneer William Walker Atkinson. In 1890 they announced a prayer group that would later be called 'Silent Unity'. In 1891, Fillmore's 'Unity' magazine was first published. Dr. H. Emilie Cady published 'Lessons in Truth' in the new magazine. This material later was compiled and published in a book by the same name, which served as a seminal work of the Unity Church. Although Charles had no intention of making Unity into a denomination, his students wanted a more organized group. He and his wife were among the first ordained Unity ministers in 1906. Charles and Myrtle Fillmore operated the Unity organizations from a campus near downtown Kansas City.